The subheader overlaps the main header when disabling the subheader stickiness

[4oh3]

Describe the bug

When the <wa-page> element has the attribute with the value of disable-sticky="subheader" (while the <header slot="header"> element defaults to being sticky), the <nav slot="subheader"> element overlaps the <header slot="header"> while scrolling past it.

To Reproduce

Steps to reproduce the behavior:

1. Add the <wa-page disable-sticky="subheader">, <header slot="header"> and the <nav slot="subheader"> elements
2. Add some content within the <main> element to provide some vertical overflow scroll
3. Scroll down a few 100 px's
4. Note the subheader overlapping the main header

Screenshots